6
wIRINg TERmINAl
wire specifications
18-24 gauge thermostat wire
Installation notes
• Ensure power at the HVAC equipment is off.
• Loosen screw terminals, insert stripped wire
and re-tighten.
• Push the excess wire back into the opening
and plug the wall opening to prevent drafts.
INSTAllATION
RC
– 24 VAC supply cooling*
R
– 24 VAC supply heating*
w
– 1st stage heat / auxiliary
Y
– 1st stage cooling / compressor
g
– Fan
C
– RC 24VAC common (optional when powered by batteries)
S1 & S2
– outdoor temperature sensor (optional)
O/b
– Reversing valve
l
– System fault indicator
w2
– 2nd stage heat / auxiliary
Y2
– 2nd stage cooling / compressor
* Jumper between RC & R is used in single transformer systems
(see wiring diagrams).
C
G
Y
W
R
L
S1 S2 O/B
W2 Y2
RC
61000652D 8400 Tstat Install.indd 6
7/9/13 9:03 AM
